Boeing machinists rejected the company’s latest contract offer, extending a strike that has crippled commercial aircraft production.

On Wednesday, union members voted 64% to reject Boeing’s latest offer, which included a 35% wage hike.

“There are consequences when a company mistreats its workers year after year,” said Jon Holden, the president of the International Association of Machinists and Aerospace Workers District 751, in a statement announcing the vote.

“Boeing workers are saying they are fully and strongly committed to balancing that out by winning back more of what was taken from them by the company for more than a decade,” Holden said.

About 33,000 members of the International Association of Machinists and Aerospace Workers (IAM), who produce Boeing’s top-selling 737 MAX and other jets in Seattle and Portland, began a strike on September 13 for higher wages and a better pension.

Boeing has lost more than $33 billion since 2019, including $6.1 billion in the third quarter from the strike, due to a series of crises, including the deaths of 346 people from two similar crashes of its 737 MAX jet in less than five months.

Pausing plane production weighs on airlines that fly Boeing jets and more than 10,000 suppliers in all 50 states that manufacture parts, including fasteners.